ultimatepp/upptst/DrawArc/main.cpp

#include <CtrlLib/CtrlLib.h>
#include <Painter/Painter.h>

using namespace Upp;

struct MyApp : TopWindow {
	virtual void Paint(Draw& w);
};

void Test(Draw& w)
{
	Pointf center(350, 300);
	for(int i = 0; i < 13; i++) {
		double angle = (i - 3) * M_PI / 6;
		Pointf box_center = Polar(center, 250, angle);
		Size radius(60, 20);
		Rect box(Point(box_center), Size(1, 1));
		box.Inflate(radius);
		w.DrawRect(box, Yellow());
		for(int j = 0; j < 12; j++) {
			double ang2 = j * M_PI / 6;
			Sizef hand = Polar(Pointf(0, 0), 1, ang2);
			Point h1(box_center + Sizef(radius) * hand);
			Point h2(box_center + Sizef(radius) * 0.7 * hand);
			w.DrawLine(h1, h2, 1, LtBlue());
		}
		Sizef hand = Polar(Pointf(0, 0), 1, angle);
		w.DrawArc(box, Point(box_center + radius * hand), box.TopCenter(), PEN_DASHDOT, LtRed());
	}
}

void MyApp::Paint(Draw& w)
{
	w.DrawRect(GetSize(), White());
	Test(w);
	ImagePainter iw(700, 600);
	iw.Clear(White());
	Test(iw);
	w.DrawImage(700, 0, iw);
}

GUI_APP_MAIN
{
	MyApp().Run();
}